| EQUIVALENTS |
| ANCIENT GREEK: Cyrillus, Kyriakos, Kyrillos |
| BULGARIAN: Kiril |
| CZECH: Cyril |
| ENGLISH: Cyril |
| FRENCH: Cyril, Cyrille |
| GREEK: Kyriakos |
| ITALIAN: Ciriaco, Cirillo |
| LATVIAN: Kirils |
| MACEDONIAN: Kiril |
| MEDIEVAL SLAVIC: Kyrilu |
| POLISH: Cyryl |
| PORTUGUESE: Ciríaco |
| RUSSIAN: Kirill |
| SLOVAK: Cyril |
| SLOVENE: Ciril |
| SPANISH: Ciríaco, Ciriaco |
| UKRAINIAN: Kyrylo |
| DIMINUTIVES AND SHORT FORMS |
| ENGLISH: Cy |
| MACEDONIAN: Kire, Kiro |
| FEMININE FORMS |
| ENGLISH: Cyrilla |
| FRENCH: Cyrielle |
| GREEK: Kiki, Kyriake, Kyriaki |
| LATE ROMAN: Cyriaca |
| SLOVENE: Cirila |